77509792434 has 32 divisors (see below), whose sum is σ = 156232964160. Its totient is φ = 25634601792.

The previous prime is 77509792429. The next prime is 77509792447. The reversal of 77509792434 is 43429790577.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1336872 + ... + 1393644.

It is an arithmetic number, because the mean of its divisors is an integer number (4882280130).

Almost surely, 2^77509792434 is an apocalyptic number.

77509792434 is an abundant number, since it is smaller than the sum of its proper divisors (78723171726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77509792434 is a wasteful number, since it uses less digits than its factorization.

77509792434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58554.

The product of its (nonzero) digits is 13335840, while the sum is 57.

The spelling of 77509792434 in words is "seventy-seven billion, five hundred nine million, seven hundred ninety-two thousand, four hundred thirty-four".